Theodore g



T. G. ROSTER.

Pump.

No. 225,930 Patented Mar. 30, 1880.

INVENTU B.

Ill

IIIIHII MeV/Z H Il UNITED STATES PATENT OFFICE.

IHEODORE G. HOSTER, OF BROOKLYN, NEW YORK, ASSIGNOR OF ONE-HALF COF HIS RIGHT'TO WILLIAM HECKER'I, OF SAME PLACE.

PUMP.

SPECIFICATION forming part of Letters Patent No. 225,930, dated March 30, 1880.

Application iiled January 25, 1879.

' To all 'whom it may concern:

Be it known that I, THEoDoRE G. Hos'rER, of Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Pumps, of which the following is a specification, reference being had to the. accompanying drawings, forming part i thereof.

This invention is related to that class known 1o as air, gas, or vapor compressors,7 and is intended more particularly for pumping or compressing the more volatile substances which are penetrating and liable to leak past the piston-head and through the stalling-boxes of the ordinary pump and air-compressors. It is especially adapted to obviate, as will hereinafter more fully arme-ar, the difficulties so often experienced by the escape of expensive, uuhealthy, dangerous, and explosive substances zo while pumping or compressing the same.

The invention consists in the construction of a cylinder, cylinder-head, and piston similar in many respects to the ordinary engine in either vertical or horizontal position. On two opposite sides of the cylinder are cast round flat chambers, like a steam-chest, extending to or beyond the ends of the cylinder, and are provided with covers or lids. A port-hole enters one of the chambers on the upper end of 3o the cylinder, and on the lower end of the same a second port-hole puts the other chamber in direct communication with the cylinder. To the inside of the covers or lids of the chambers are secured lens-shaped disks, each com- 3 5 posed of two hollow spherical segments tightly secured to each other with their' respective bases by ilan ges on the peripheries of the same.

Through the lids or covers enter pipes provided with inlet and outlet valves into the hollow disks, thereby forming communication with the outside. l

It is now obvious that if thel disks should be subjected to pressure they would close and expel any gas, air, or fluid contained therein through the outlet-valves, and when again set free would draw in a new supply ot' whatever substance to be pumped through the inletvalves. A repetition Jl' this operation would produce a flow through said pipes andvalves 5o without leakage into or comin g in contact with what may be in the cylinder or the two chambers on its sides.

In the accompanying drawings, in which similar letters of reference indicate like parts, Figure l is a sectional side view of a vertical 55 pump on the lines .fr a.' of Fig. 2. Fig. 2 represents a vertical longitudinal section of a doubleacting pump. Fig. 3 shows a disk which has its two sides corrugated; and Fig. 4 is a disk with two flat sides, connected with each other 6o by V and A shaped rings, which allow contraction and expansion.

In the cylinderA works apiston, B, by means of piston-rod C, connected with some outer driving suitable force. In direct communication with the cylinder are the chambers D and E on each side ofthe cylindenby the portholes a and b, respectively, on the upper and lower end of the cylinder. The chambers D and E are provided with covers or lids F and Gr, 7o to which are secured the disks H and I by means of rings c and c. Through the covers F and G lead the pipes d and d', which are provided wi th inlet and outlet valves e and e' and j' 'and f into the hollow disks H and I. Said 75 valves may be put directly in connection with the disks, as shown in Fig. 3. The cylinder A and side chambers, D and E, are lled with either air, water, alcohol, oil, or any other suitable substance, as the case may require.

The operation of this machine is now as follows: If by any of the well-known means a re` ciprocatin g motion is given to the pistou B, assuming it hadbeen at its outer stroke, as shown in Fig. 2, the substance contained in the cylinder A and the side chamber, D, exerts apressure on the sides of the disk H, closing and expelling the contents in it through the outletvalve e. On the return stroke of the piston the substance in the chamber D will ilow 9o through the port-hole a into the cylinder, thereby forming a vacuum in the chamber D, which will cause the substance to be pumped to open the valve ein the pipe d and exert its force (atmospheric pressure) against the inner sides of the disk H, thereby opening and refilling it.

At the same time, on such return stroke of the piston B, the disk Iin the opposite chamber, E, connected by the port-hole b with the cylinder A, is alternately filledthrough valvef and roo discharged by valve f in pipe d', in the same manner as above stated ,on the opposite side of the cylinder. It' the pipes above valves e and f are connected, (as may be also the pipes below the valves e and f,) it will produce a constant flow of gas, vapor, or fluid which they may contain.

To facilitateV the expansion and contraction or opening and closing the disks, I construct them of various designs, and use different material to adapt them to the circumstances and substances encountered in the use of the machine. When said disks are constructed of very thin steel, brass, copper, or other similar metal to pump acids, gases, Sie., I make the sides either plain, as shown in Fig. 2, or corrugated, as seen in Fig. 3, so that the corrugations of the sides fit into each other \vl1e1relosed, thereby expelling all its contents., or I shall con struct the disks as represented in Fig. 4.

In cases where the substance to be pumped allows it, I use either leather, rawhide, rubber, or similar material in the shape of either disks or bags, so as to admit alternately lling, or emptying by the-action of the machine, as before stated.

What I claim isl. A cylinder, A. with its port-holes a and b, chambers D and E,being filled withand having confined therein either oil, air, Water, alcohol, or other substance in iiuid form, operating as a piston with the piston B, as and for the purpose specified and described. v

2. The combination of the cylinder A, chambers D and E, filled with either oil, air, Water, alcohol, or other substance in duid form, and the disks H and l, as and for the purpose specified and described.

3. rlhe chambers D and E, filled with either oil, air, water, alcohol, or other substance in fluid form, in combination with the disks H and I, connected to covers F and G, as and forA THEDORE G. ROSTER.

Witnesses:

B. S. CLARK, HENRY ErcHLme. 

